4 Pcs - Lock Extension Table Bed Leg Feet Steel Folding Foldable Support Bracket Screw A Material: steel plate Size: 55mm(2.16")x60mm(2.36")x75mm(2.95") heavy duty--make of thickness steel plate, each bracket could hold 500 pounds self lock-- when you fold the leg, the bracket will be locked automatically. with screws Use for Extension Table Bed Leg Feet and so on